Reciprocating pump



3 Sheets-Sheet l INVENTORJ.

"n BY m E. F. WRIGHT ETAL.

RECIPROCATING PUMP ARTHUR G. ROCKWOOD ELLJOTTF. WRfiGHT Sept. 9, 1952 Filed Nov. 22, 1946 P 1952 E. F. WRIGHT ETAL 2,609,756

RECIPROCATING PUMP Filed Nov. 22, 1946 5 Sheets-Sheet 2 FIG.4-

AR+HUR G-ROCKWOOD ELIJOTTF. WRiGHT I IN VEN TOR BY W Sept. 9, 1952 E. F. WRIGHT ET AL RECIPROCATING PUMP Filed Nov. 22, 1946 3 Sheets-Sheet 5 FIG-.5

ARTHUR G. ROCKWOOD ELUOTT F. WRIGHT IN VEN TOR.

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Patented Sept. 9, 1952 UNITED" STATES PATENT oFFicE I l 2,609,756 7 2 2 2 RECIPROCATIVNG PUMP Elliott F. Wright, Summit, and Art hur Roekwood, Nutley, N. J., assignors to Worthington Corporation, a corporationpf' Delaware I Application November 22, 1946, Serial No. 711,546

This invention relates to reciprocating pumps and particularly to such pumps for pumping fluids containing a percentage of solids, such as sewage'or the like.

In pumping sewage particularly as well as in some other pumping installations, the pumps inevitably become clogged with foreign matter which must beremoved to permit proper operation of the pump, and it is an object of the present invention to provide a pump for such service which can be quickly and easily cleaned, and any clogging foreign matter removed from the valve of the pump without requiring dismantling of the pump.

Another object of the present invention is to provide a reciprocating pump for such services as specified which provides a straight pumpthrough flow of liquid pumped, as well as one in which'anovel type and arrangement of valves is employed resulting in simplified construction, elimination of angles and curves in the flow path of fluid pumped, as well as a pump structure from which the valves may be easily removed.

A further object of the present invention is to provide a pump of relatively small capacity to operate under a low discharge head which will have passages and valves of sufficient area to pass a certain amount of solids.

With these and other objects in view, as may appear from the accompanying specification, the invention consists of various features of construction and combination of parts, which will be first described in connection with the accompanying drawings, showing a reciprocating pump of a preferred form embodying the invention, and the features forming the invention will be specifically pointed out in the claim.

In the drawings:

Figure 1 is a side elevation of the pump.

Figure 2 is an end elevation of the pump.

Figure 3 is a vertical section through the pump taken on the line 33 of Figure 4.

Figure 4 is a vertical section through the pump taken on the line 44 of Figure 3.

Figure 5 is a horizontal section through the pump taken on the line 5-5 of Figure 4.

Referring more particularly to the drawings the improved reciprocating pump includes a housing I having a pulsation chamber 2 therein into which the inlet passage 3 of the pump opens in straightaway alignment with the outlet or discharge passage 4 of the casing.

The fluid or liquid to be pumped is drawn into and discharged from the pulsation chamber 2 by means of a piston 5 which reciprocates in the cylinder 6 disposed at right angles to the axis of 1 Claim. (Cl. 103-153) charge 4.

the inlet passage 3 and discharge passage 4. The cylinder 6 opens into the pulsation chamber 2 so that when the piston 5-moves upwardly on its suction stroke liquid will be drawn into the pulsation chamber past the inlet valve Lwhichwill be drawn open by the suction stroke of the piston 15. During the downward or discharge stroke of the piston 5 the inlet or suction va'lvel will be forced against its seat and the pressure created by the downward stroke of the piston'wi'll unseat the discharge valve 8 and force the liquid from the pulsationchamber 2 out through the dis The piston 5 has a double cup packing 9 carried thereby and held in place by the removable head In of the piston, which double cup packing will permit the pump to operate with a suction lift without air leakage. l I

A connecting rod II isconnectedto the piston 5 and is also eccentrically connected to a disc I2 mounted on the shaft I3 of a geared head motor I4 of any approved type. The disc I2 and its manner of connection with the connecting rod form a crank for reciprocating the piston 5by rotation of the motor shaft I3.

The inlet valve I and the discharge valve 8 are alike in construction, each comprising a substantially semi-spherical head I6 which seats against a valve seat IT. The head I6 of each valve structure is detachably connected by a suitable cap screw I8 to a flat resilient strip I9. The strips I9 may be of rubber or similar material or may be flat springs of metal as desired.

The strips I9 are bent substantially at right angles and have their ends remote from the valve heads I6 detachably connected by cap screws 20 to removable cover plates 2| and 22. The cover plate 2I which carries the inlet valve structure I closes an opening which opens into the pulsation chamber 2, while the cover plate 22 which carries the discharge valve structure 8 opens into the discharge passage 4 of the pump. The cover plates 2I and 22 are attached to the housing I by wing nuts 23 so that they may be easily removed for removing the valve structures I and 8 from within the housing to permit cleaning of the valves and the removal therefrom of foreign matter which might get wound around them during operation of the pump. When the cover plates 2I and 22 together with the valve structure carried thereby are removed any foreign matter in the pulsation chamber 2 may be easily removed or allowed to drain through the openings 24 into a suitable catch pan or basin as shown at 25 in dotted lines in Figure 3 of the drawings.

The resilient strips I9 havesuflicient resiliency to permit the valves 1 and 8 to be moved on or off their seats by operation of the piston 5 to provide for proper operation of the pump.

If it is so desired eye-bolts as shown at 26 may be connected to the covers 2| and 22 to facilitate their handling during disconnection from or connection to thehousing I.

Suitable gaskets are employed :at all leakage joints of the pump as is usual in pump construction.

As will be seen from the drawings taken in connection with the foregoing description a pump has been provided for low capacity relatively .low discharge head operation, which is capable of passing a relatively large amount .of solid matter contained in the fluid pumped and that aminimum of angular bends or surfaces are provided in the flow passage of the fluid, which'would interfere with the passage of solids through the pump, and thatany solids orstringy foreignmatter. which might accumulate. in the pumpor upon its valvesmay be removed with a minimum of .efiort and expense.

It Will be understood that the invention .is not to be limited to the-specific construction or arrangement of part shown, but that they may be widely modified within the invention, defined by theclaim.

What isclaimedis In a reciprocating pump for a sewage system, a housing having a pulsation chamber therein parallel to the horizontal axis thereof, a cylinder. in said housing communicating with the vupper end .of said pulsation chamber, a reciprocating pumping piston in said cylinder, and means. for reciprocating said piston, said pulsation chamber provided with a. horizontally disposed .inlet passage having its longitudinal axis in axial alignment with said pulsation chamber and disposed at all points thereof above the lower portion of said pulsation chamber to form a trap in said chamber for semi-solids, said pulsation chamber provided with a discharge passage opchamber, :a discharge valve inrsaid discharge passage to open and close said discharge passage responsive to movement of said pumping piston to control the flow of sewage from said pulsation chamber. to said discharge passage, said housing provided with a first opening into said pulsation chamber and a second opening into said discharge passage, a :first and a second removable closure plateto-cover said openings in the housing, said inlet valve being attached to, wholly supported by and removable in assembled condition with said closure plate for the pulsation chamber, and said discharge valve attached to, wholly supported by .and removable with the closure plateforsaiddischarge passage.

ELLIOTT F. WRIGHT. ARTHUR-G. ROCKWOOD.

' REFERENCES CITED The following references are of record in the file of this "patent:

UNITED STATES PATENTS Number I Name Date 23,690 Laning Apr. '19, 1859 158,381 Knowles J an 5,1875 769,707 .Miller Sept. .13, 1905 1,763,235 Gyger June .10, 1930 1,770,683 7 Davis July 15, .1930 1,904,486 Longenecker Apr. .18, 1933 2,112,630 Marshall Mar. 29,1938

FOREIGN PATENTS Number Country Date 457,220 Great Britain 1936 

